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In this example, p2 is assigned the value returned by bar(), but that value is never used. Note this example assumes that foo() and bar() return valid pointers. (See DCL30-C. Declare objects with appropriate storage durations.)
| Code Block | ||||
|---|---|---|---|---|
| ||||
int *p1, *p2;
p1 = foo();
p2 = bar();
if (baz()) {
return p1;
}
else {
p2 = p1;
}
return p2;
|
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Tool | Version | Checker | Description | ||||||
|---|---|---|---|---|---|---|---|---|---|
| 1 D | Fully implemented. | |||||||
| UNUSED_VALUE | Finds variables that are assigned pointer values returned from a function call but never used. | |||||||
|
| Can detect violations of this rule with a number of checkers. | |||||||
| PRQA QA·C |
| Fully implemented |
Related Vulnerabilities
Search for vulnerabilities resulting from the violation of this rule on the CERT website.
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CERT C++ Secure Coding Standard: MSC13-CPP. Detect and remove unused values
ISO/IEC TR 24772 "BRS Leveraging human experience," "KOA Likely incorrect expressions," "XYQ Dead and deactivated code," and "XYR Unused variable"
Sources
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